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Q. In which decade was the telegraph invented?
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Q. One Torr is equivalent to how many mm of Mercury?
Q. Which of the following is the unit of perceived loudness of sound ?
Q. The work done by the string of a simple pendulum during one complete oscillation is equal to
Q. The atmospheric pressure at sea level is ........ atm.
Q. Vehicles use _____ to see the objects coming from behind.
Q. Which alternative energy source is exhaustible?
Q. In a railway track, two rails are joined end to end with a gap in between them because
Q. Why does bleeding occur through the nose in high mountainous regions ?
Q. The distance between node & adjacent antinode is 30 cm. The wavelength is
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